Issued May 15, 1961. Literally “Mother and Teacher,” on Christianity and Social progress. This encyclical gave an updated interpretation of the classic theme of private property and introduced the notion of private initiative as an extension of private property. While Rerum Novarum and Quadragesimo Anno left responsibility for social justice with the individual, Mater et Magistra placed some in the hands of the state. (this encyclical needs to be read in conjunction with Pacem in Terris, literally “Peace on Earth,” Pope John XXIII’s other great encyclical.) **

Sollicitudo Rei Socialis: On the Twentieth Anniversary of Populorum Progressio

Issued on December 30, 1987. Literally “On Social Concerns,” commemorating the twentieth anniversary of Populorum Progressio. Solicitudo Rei Socialis presented an overview of modern social problems with some guidelines for action. It dealt with authentic human development and adopted a critical attitude toward both capitalism and communism. Sollicitudo Rei Socialis warned that economic development alone may not set people free but only enslave them more. **

Pope Benedict’s third encyclical, is a call to see the relationship between human and environmental ecologies and to link charity and truth in the pursuit of justice, the common good, and authentic human development. In doing so, the pope points out the responsibilities and limitations of government and the private market, challenges traditional ideologies of right and left, and calls all men and women to think and act anew.